Lock bolt and nut.



E. A. PACK & R. A. MOON.

LOCK BOLT AND NUT.

APPLIUATIOH FILED nov. 23, 1910v Patented Feb. 13, 1912.

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mm A rack RUPERT A. moon, or wnrsnn, rnsno.

' Be it known that we, Emma AJPAQK and at Weiser in the county of Washington,' t te of Ida 0, have invented certain new an useful. Improvements in Lock Bolts and Nuts; and we do hereby declare the, following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which alppertains tomake and use the same.

- his invention relates to improvements in States, -reiaidin -in; looks and the leading ob ect in view is fg tliel'construction. of a nut lock having' en- ;IS

nuts one'off which is provided with space openingsl and the other of which is 'p'rov'ided with? a spring locking pin adapted 40 openin to fit into either one of the openings and Specification of Letters Patent. 1 ""Ap ucmoa and November 2:3,"1910. Serial No. 593,932.

whichpin is so constructed that it can be locked 'in an "inoperative pos'itionby-a slight turnin movement the f.

Wit the above and other objects in view the invention consists in certain construction's, combinations and arrangements of parts, clearly described in' the following specification and clearly illustrated in the accompanyingdrawings in which Figure 1 is an end viefishowin the perforated nut. Fig. 2xis wlOngitu inal sectional viewshowing the arrangement ofthe locking pin. Fi"g.,'8 is a 'deta1l side elevation of the locking pinremoved from the socket of the inner nut. Fig. 4 is another side elevation of the locking pin-.

Referring to the accompanying drawings illustrating the referred embodiment of the invention, 5 and 6 denote the plates or material to be bolted to ether which plates or material are provid through which the bolt 7 is passed. The be t 7 is provided with right and left screwthreads 8. 'A large nut 9 is threaded on the threads 8 against the plate or material 6.,- ;'.lhe nut!) is provided with ri ht screw" threads and is formed with a sec 'et or o ,ening 10 in which the spring locking pin 1 is dis osed. The locking pin 11 is providedY'wit an inclined outer head 12 11 so as to hold the inclinedhead 12 out with registering bolt mck noinr-siihnnrh I J a Patented Feb. 13, 1912.

. wardly of theouter face of-the nut 9. The

in '11 is held in the socket or opening 10 or limited movement by a screw 16 which extends transversely of said socket and the inner end of said screw 16 projects into the path of the movement of the pin 11 so as to engage with the inner end of said pin and the head 12 thereof. a

When it is desired to hold the inclined head 12 of the pin 11 in the opening or socket 10 the in is rotated in said opening or socket so that the screw 16 will project into the slot of the groove 14, but when it is desired to hold the pin in the opening for limiting movement, said pin is arranged so that the inner end of the screw projects into one of the slots 13'. Asecond or outer nut 17 is threaded on the bolt.'7 against the nut9. The nut 17 is provided with radially spaced 0 enings 18 adapted to receive the inclined ead 12 of the pin 11. When the in 11 is arranged in the opeiiing 10 for s lght movement and with its inclined head 12 rejecting outwardly of the openin and t e outer nut 17 is threaded a ainst t e inner nut 9 the pin will engage with the openings'18 of said outer nut 17 until finally the outer nut 17 contacts with the inner not 9 andcan no longer be tightened on the bolt 7 When the outer nut reaches its innermost position on the bolt 7 one of the o nings 18 will be in registering position with the pin 11 and the inclined head of said in will spring into said opening so as to old the nut against further rotation. The inclined head 12 of the in 11 permits the inward movement of the outer nut 17 and prevents the outward movement of said nut 17 and thereby locks the two nuts and cons uently the bolt, by reasoh'of the right and le t screw threads of the bolts and the two nuts against movement.

The pin 16 is preferably forced into the nut 9 when the same is very hot so it will be fixed to said nut 9. The lockin pin 11 is formed with a longitudinally disposed slot 16 which is ada ted to engage the inner end or terminal 0 the pin 16 and permit of the removal of said pin 11 when the s ring is broken and consequently permit e re-* placement of a broken spri The improved nut lock can bemanufacturedvery cheaply and is capable of wide applicationin the meehanical arts 'and does not require'any radical change in the con- 'tudinal slot formed in said pawl,

being formed with a transverse slot to re-- 'struction of the bolt and nut fastening devices, What is claimed is 1. In a nut look, a bolt having right and left hand screw threads, a nut having right screw threads fitted on said bolt, said nut being provided with a socket, a spring pressed pawl arrangedwithin said socket, said pawl being provided with a beveled face, a pin carried by said nut, said pin extending within said socket, the end portion of said pin being arranged to enter a longisaid pawl ceive the end (portion of said pin when the pawl is force against the tension of said sprin and a nut provided with left hand threa s, said nut being formed with a plurality of apertures to receive the beveled end ortion of said pawl.

2. n a nut look, a bolt having right and left hand screw threads, a nut provided with right threads fitted on said bolt, a socket formed in said nut, a pawl mounted for movement within said socket, a 'sprin bearing against the end portion of said pawl, a pin carried by said nut, said pin extending within said socket, and entering a transverse groove formed in the pawl to hold. the same against the tension of said spring, said pawl being provided with a longitudinally arranged oove adapted to normally accommodate't end portion of said in, and a second nut provided with left t iireads, said nut being formed with apertures to receivze the end portion of said pawl.

3. In a nut lock, a bolt having right and left screw threads, a nut having right threads fitted on the bolt, said nut having a socket, a pawl disposed in the socket bearing against a s rin said awl bein' provided with an inc ine slotte outer en and with body slots, two of said slots being formed in the sides of the pawl and extending longitudinally of said pawl and one of said slots being formed transversely in said pawl and communicating with the longitudinal slots,

a pin threaded in the nut adapted to engage either of the slots of the pawl to hold said pawl in the nut socket for limited movement or against movement with the inclined head thereof secured inwardly of the outer face of the nut, and a nut threaded on the bolt and formed with left screw threads to engage the screw threads of the bolt and with openings adapted to receive the inclined'end o the locking pawl.

In testimony whereof, we affix our signatures in presence of two witnesses.

EARLE A. PACK. RUPERT A. MOON.

Witnesses:

- A. L. TRENAM,

Mines Cannon, 

